Model Analysis Results

Overview

The following maps identify population and employment characteristics within 1/4-mile euclidean buffers of roadway segments in the study corridor. Roadway segments are split into analysis components no longer than 500-feet.

Data & Method

Summary

Population and employment data are obtained from the regional travel demand model. Zonal estimates are disaggregated weighted by area and future land use disaggregation (with relative land use weights applied). Land use weights are documented below.

Disaggreagted population and employment estimates are then summarized to the roadway segment level. A 1/4-mile buffer is generated around each segment and the population and employment of buildings that have their center inside the buffer are summed up. These values are converted to per acre densities by dividing by the number of acres in each buffer. The result is a population and employment density growth estimate for each roadway segment.

Data

Land Use Weights

Each land use is assigned a relative weight for both population and employment. These weights are applied in conjunction with land area to disaggregate population and employment within each TAZ to zones subdivided by future land use categories. The tables below document weights applied. In this table, a value of 0 represents no allocation is made. 3 represents “high”, or 3 times as many

Land Use Desc. Relative POP Weight Relative EMP Weight
COMMERCIAL 0 3
CONSERVATION 0 0
INDUSTRIAL 0 2
INSTITUTIONAL 0 2
MIXED USE - GENERAL 2 2
MIXED USE - NEIGHBORHOOD/ACTIVITY CENTER 2 2
MIXED USE - SPECIAL PLANNING AREA 2 2
OFFICE/PROFESSIONAL 0 3
RECREATION 0 1
RESIDENTIAL HIGH (> 12 DU/AC) 3 0
RESIDENTIAL LOW (2.01 - 5 DU/AC) 1 0
RESIDENTIAL MEDIUM (5.01 - 12 DU/AC) 2 0
RESIDENTIAL VERY LOW (0.51 - 2 DU/AC) 1 0
TRANSPORTATION/UTILITIES 0 0
UNKNOWN 0 0
WATER 0 0

Disaggregation Analysis Example (Employment)

Map of TAZ Employment Estimates and Building Footprints w/ Land Use

This map shows the control totals (employment estimate by TAZ) with future land use designations symbolized based on the land use associated with the footprint. Employment in each TAZ is allocated to the land use within the zone based on a combination of the land use weight (documented above) and the area of the land use.

Mapping Segments Analysis Results

Employment Density Growth

This map shows employment density growth within 1/4-mile buffers of each roadway segment.

Population Density Growth

This map shows population density growth within 1/4-mile buffers of each roadway segment.

Activity Unit Density Growth

This map shows activity unit density growth within 1/4-mile buffers of each roadway segment.